Fuel and air mixing device



Nov. 18, 1952 K Q AGAR 2,618,474

FUEL AND AIR MXING DEVICE Filed July l5, 1950 2 SHEETS--SHEET l ze F/G;

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iria/nef Nov. 18, 1952 K Q AGAR 2,618,474

FUEL. AND AIR MIXING DEVICE Filed July l5, 1950 2 SHEETS-SHEET 2 INVENToR. www 5, fe

Patented Nov. 18, 1952 FUEL AND AIR MIXING DEVICE Kenneth C. Agar, Ann Arbor, Mich., assigner to Clinton Machine Company, Clinton, Mich., a

corporation of Michigan Application July 15, 1950, Serial No. 174,039

(Cl. Mil-#641.)

Claims. l

My invention relates to a new and useful improvenient in a mixing valve for internal combustion engines and is particularly adapted for use on engines of the one cylinder type.- In this class of engines the use of a carburetor' is dispensed with and a mixing valve is employed instead.

It is an objectfof the present invention to provide a mixing valve which will be simple in structure, economical of manufacture, durable, compact and highly efficient in use.

Another object of the invention is the provision of a mixing valve which is adapted for mounting on the tank in which the gasoline or fuel is contained.

Another object of the invention is the provision of a mixing valve of this type of a throttle valve so arranged and constructedthat it may be economically manufactured, may be'highly eihcient in use and may be easily and quickly placed in position or removed therefrom.

Another object of the invention is the provision of a mixing valve embodying a tubular delivery .conduit having spirally directed fins or blades on the inner surface thereof for imparting a rotary motion to the fuel mixture passing therethru for facilitating the mixing of the fuel and the air.

Another object of the invention is the provision of a novel means for securing the aircontrol valve in position.

Other objects will appear hereinafter.

It is recognized thatl various modifications and changes may be made in the detail of the structure illustrated without departing from the invention and it is intended that the present disclosure shall be but the preferred embodiment of the invention.

Forming a part of this specification are drawings in which,

Fig. l is a side elevational vievv of the invention showing it applied with parts brokenaway.

Fig. 2 is a top plan view taken on line 2 2 of Fig. 1,

Fig. 3 is a fragmentary sectional View taken on line 3-3 of Fig. 1,

Fig. 4 is a sectional View taken on line li-4 of Fig. l.

Fig. 5 is a sectional view taken online 5 5 of Fig. 1.

Fig. 6 is an end elevational View of the invention from one end.

Fig. 7 is an end elevational view of the inven" tion from the opposite end.

Fig. 8 is 4a fragmentary sectional `view taken on l'meS-B of Fig. 4.

As shown in the drawings the invention is adapted for use with a-gasoline or fuel tank 'I5 having a top IE. The invention embodies a tube il', formed preferably integral with which is a base I8 which is adapted to be secured'by the screws I9 to the outer face of the top i6 of the tank. Formed on the tube l1 and projecting upwardly therefrom is a cup` 2B havingi the outwardly extending flange 22 on which rests a gasket 2l bearing against which is the lower end of the air cleaner 23 which has a cap 24. Projecting upwardly from the base of thecup 2'! is a boss 25 which is internally threaded and into which threads one end of a stem 26, the other end projecting thru the cap or cover 24 and being secured in position by the Wing nut 2l.

Rotatably mounted in the end of the tube ll is a choke valve 29 Which is tubular and which is cut away as at 28 and a's at 33. This cut-away portion 28 leaves the end portion intact so that there is a rib (i2 at the inner end of slot 28. This Valve is provided with a head or ange 30 Which bears against the gasket 3| and which is provided w'ith the gripping and indicating portion 8o. When the stud 25 is threaded into position the end ofthe stud will project inwardly of the tube Il suiiiciently to engage in the cut away portion 28 so that the choke-valve' is thus held in posi-v tion in the end of the tube l1. The bottom of the cup 20 is cut away as at 28a so as to register with the cut-away portion 33 so that the air cleaner is thus in communication thru the cut-away por` tion 33 with the interior of the tube l1.

As shown in Fig. 5 the tube' II has a cylindrical bore 3d which communicates with the tapered bore 35i. The end of the tube il is provided with the outwardly projecting flange 36 in which are formed the openings 31 whereby the tube I1 may be connected to the intake manifold of the engine. Formed on the inner face of the bore 35 are spirally directed varies or blades 38 which are intended to impart a' rotary motion to the fuel mixture passing thru the tapered portion 35.

Formed on the tube I1 is the cylinder 39, the tube I'l having the annular flange 40 projecting upwardly therefrom tovform a continuation of this cylinder 3d. Rotatably mounted in the cylinder 39 is a throttle valve 4| which has at its lowei`v end the circular plate l2 and at its upper end the circular shoulder 43, these parts serving as bearings in the cylinder 39 so that a smooth rotation of the throtle valve 4I may be effected. A cup di is mounted o n the throttle valve ll and adapted to overliethe edges of the flange de, and bear against a gasket so as to prevent the entry of dirt or dust into the cylinder 39. Mount# ed on the reduced portion 4l of the shoulder 43 is a plate 46, this reduced portion il projecting thru the plate 45 and being upset over the same. As shown in Fig. 2 this plate i6 is provided with the outwardly projecting tongue 53 and the nuts 9. Formed in the plate 45 is a hole 50 and projecting downwardly fron one side of the plate are the lugs 5| in which is threaded an adjusting screw 52 which is adapted to engage against the post 53 projecting upwardly from the tube I1 and having the angularly turned tongue 54 which is adapted to overlie the plate 48 and prevent upward movement of the throttle valve from its normal position. When the throttle valve is moved so that the nuts 49 register with the tongue 5d the throttle valve may be bodily lifted upwardly out of the cylinder 39. Pivotally mounted by the screw 5G on the tube I7 is the arm 55, in an angularly turned portion of which is formed an opening 54 in which one end of a spring may be engaged. These springs are not shown as they form no part of the present invention and their use is well known.

An angularly turned tongue 65 is formed on the plate 51 to serve as an abutment for the arm E!) when swung in one direction.

A tube 61 is projected into the tank l5 and is provided at its lower end with a head 63 having a filter screen 69. The upper end of the tube 6l extends into the passage 10 formed in the base i3, this passage communicating with the space 'il between the plugs T2 and 13. Threaded through the plug T2 is a needle valve M adapted for controlling the communication of the passage with the space 'l l. This passage 'I5 communicates with the passage E6 which is in communication thru the passages 17 and 13 with the interior 34 of the body Il. The flow of fuel through these passages il and 'ES into the intake manifold through the passage 35 may be controlled by the throttle valve lli and the amount of ow into the passages 'il' and 'F8 may be controlled by the needle Valve 'iii embraced by the spring '19. On the end of the member Il, as shown in Fig. 6, there is a flange 89 on which is indicated the direction of rotating the choke valve 29 either to choke position or to running position, a pointer Si! being formed on the end of the valve 29. The operation of the choke valve in an engine with which the invention is used is well known and the rotation of the throttle valve is also well known.

With a construction oi this type, there is provided a mixing valve which may be inexpensively manufactured and easily removed and replaced and which is held in position in a novel manner, namely, by the use of the stem 26 and as described.

The throttle valve is also one which may be easily and quickly removed and replaced and which has proven most eiiicient in use.

What I claim is:

1. In a fuel mixing valve of the class described, a base; a tubular body mounted on said base and open at one end; a cup-shaped body projecting upwardly from said tubular body adjacent one end and having a base, there being an opening formed in the base of said cup-shaped member communicating with the interior of said tubular body; an air cleaner mounted on said cup-shaped body; a threaded stem projected through said air cleaner and threaded through the base of said cup-shaped body to extend into said tubular body for securing said air cleaner on said base; a choke valve inserted in the open end of said tubu- 4 lar body for closing said end, said choke valve having a cut away portion intermediate its ends for reception of the inwardly projecting end of said stem whereby said choke valve is retained in said tubular body.

2. In a fuel mixing valve of the class described, a base; a tubular body mounted on said base and open at one end; a cup-shaped body projecting upwardly from said tubular body adjacent one end and having a base, there being an opening formed in the base of said cup-shaped member communicating with the interior of said tubular body; an air cleaner mounted on said cup-shaped body; a threaded stem projected through said air cleaner and through the base of said cup-shaped body to extend into said tubular body and to secure said air cleaner on said base; a choke valve inserted in the open end of said tubular body for closing said end, said choke valve having a cutl away portion intermediate its ends for reception of the inwardly projecting end of said stem whereby said choke valve is retained in said tubular body; and a cut away portion on said choke valve adapted, upon rotation of said choke valve to one position, for communicating with the opening in said base of said cup-shaped body for controlling the flow of air into said tubular body.

3. In a fuel mixing valve of the class described embodying a base, a tubular body mounted on said base and open at one end, a cup-shaped body projecting upwardly from said tubular body adjacent the open end thereof and having a base, there being an opening formed in the base of said cup-shaped member communicating with the interior of said tubular body and with the interior of an air cleaner positioned on said cup-shaped body; a threaded stem projected through the cleaner and through the base in said cup-shaped body to extend into said tubular body and secure the cleaner on said base; a choke valve inserted in the open end of said tubular body for closing said end, said choke valve having a cut away portion intermediate its ends for the reception of the inwardly projecting end of said stem whereby said choke valve is retained in said tubular body; and a cut away portion on said choke valve adapted, upon rotation of said choke valve to one position, for communicating with the opening in said base of said cup-shaped member for controlling the iiow of air through said cleaner into said tubular body.

4. In a fuel mixing valve of the class described embodying a tubular body open at one end and communicating through an opening, adjacent its open end, with an air cleaner mounted on said body at said end and said air cleaner having a threaded stem projected therethrough and threaded into said body for securing said cleaner on said body; a choke valve inserted in the open end of said body for closing said end; an inwardly projecting end on said stem projecting inwardly of said tubular body, said choke valve having a cut away portion intermediate its ends for the reception of said inwardly projecting end of said stem whereby said choke valve is retained in said tubular body.

5. In a fuel mixing valve of the class described embodying a tubular body open at one end and communicating through an opening, adjacent its open end, with an air cleaner mounted on said body at said end and said air cleaner having a threaded stem projected therethrough and threaded into said body for securing said cleaner on said body; a choke valve inserted in the open end of said body for closing said end; an inwardly projecting end on said stem projecting inwardly of said tubular body. said choke valve having a cut away portion intermediate its ends 5 for the reception of said inwardly projecting end of said stem whereby said choke valve is retained in said tubular body, and a cut away portion on said choke valve adapted, upon rotation of said choke Valve to one position, for communicating with said opening for controlling the flow of air through said cleaner into said tubular body.

KENNETH C. AGAR.

REFERENCES CITED The following references are of record in the file of this patent:

Number UNITED STATES PATENTS 

